Column-clamp.



F. KEES.

COLUMN CLAMP.

APPLICATION FILED MAY 13,1912.

1,057,742. I at nted Apr. 1, 1913.

v j ajzdwm UNITED STATES PATENT OFFICE.

FIREDERICK KEES, OF MINNEAPOLIS, 1V[I1\T1\TESOTA1 ASSIGNOR 0F ONE-HALFTO GEORGE Y W. WENZEL, OF MINNEAPOLIS, MINNESOTA.

COLUMN-CLAMP.

,others skilled in the art to which it-appertains to make and use thesame.

My invention has for its object to provide 'an extremely simple andhighly efficient clampfor column forms adapted for use-in theconstruction of concrete columns, and r to such ends,- generally stated,the invention consists ot'the novehdevices and combinat1ons of deviceshereinafter described and defined in the claims.

2.0 I The invention is illustrated in the accompanying drawhigs-wheremlike characters some so of the clamp;

'viewsp y Referring to the'drawings,Figure 1 is f'a. view-showing acolumn form in horizonandshowingin plan, the imindicate like partsthroughout the several tal section, proved clamp. applied thereto; Fig.:2 is a detail inplan with some parts sectioned and parts broken away,showing a .portion Fig. 3'is a section taken on the hue m m of Fig. 1;and Fig. 4 is a view looking at the parts shown in Fig. 2 in a directionfrom thelett toward the right.

The column form 1, as shown, is made up o'f-fou'r side boards or'memberswhich may 40 'versely crossed an elongated be of the usual or anysuitable construction. The complete clamp-comprises two pairs of fiatbars 2pivotally connected at 3 and having their free ends overlapped ortransat diagonally opposite corners of the 'colum n torm. To the freeends of the b ars'2, so-called lock levers 4 are applied. There is oneof these look levers i for each clamp bar2 and each is provided withperforation or slot adapting it to betelescoped onto or slid over theend of the corresponding clamp bar 2 The said extremities, are slightlyob-- slots, at their formed with biting edges 5,

lique and are -50 one at the inside of one extremity and the other atthe outside of the other extrem-- ity of said slot. The importantpurpose of this will presently appear. The free end of each lock lever 4is bifurcated or provided with a longitudinal groove 6 adapted to j bar2.

affords a complete clamp,

the lock levers 4.

Patented Apr. 1', 1 91s. S eria1No.696,831.

straddle the outer edgeof the adjacent clamp lVhen the tour lockleversdare applied to the ends of the tour clamp bars 2 with their bifurcatedends embracing the outer edges of the overlapping or adjacent bars. thetour barsmaking up the complete clamp are held against lateralseparation; and when the said lock levers are tightly forced, bypounding thereon with a hammer, or otherwise, as far inward as they willgo, the biting edges 5 will grip or bite upon the edges of the said barsand securely hold the said lock valves against outward slipp ngmovement. This biting action is, of course, due to the fact that theoutward force is applied to the projecting end of the lock lever, sothat the biting or cramping action is produced between the lever and thebar which is passed therethrough. The clamping levers may, however, bequite easily removed from working position by forcing outward on theperforated ends thereof.

The clamping device, so far described, but where greater clampingpressure is desired, I employ small wedges 7 which are notches 8 formedin the projecting ends of \Vhen these wedges are inserted in the notches8 and driven againstthe edges of the adjacent cla'mp bars 2, the locklevers will be very tightly clamped 0n thebars 2 which are passedtherethrough, and the clamping bars will be very tightly pressed againstthe mold. v 1 The numeral 9 indicates rivets applied to the ends of thebars 2, and which serve as stops to prevent the lock levers 4 fromcoming of? from said bars and getting displaced.

The so-called column clamp above described, is of simple construction,of comparatively small cost, may be very easily applied and removed, andin practice, has been found highly etticient for the purpose had inview. 1 v

What I claim is:

1. In a device'ot the kind described, the

combination with clamping bars, of lockinsertible in vertical 1 having acrampingjactioiison bars passed scribed, the combination with two pairsof therethrough, said levers havingbifurcated pivotally connectedclamping bars having ends that embrace the edges of adjacent bars.overlapping free ends, of lock levers having 3. In a device of the kinddescribed, the slots through which the ends of said bars combinationwith clamping bars, of lock are passed, said lock levers having acramplevershaving a cram ir'ig biting action on ing biting action on thesaid bars and havcertain said bars and having projecting ing projectingbifurcated ends that embrace ends bearing] against adjacent bars, andthe edges of adjacent bars. wedges seated in diet-projecting ends ofsaid- 6, In a device of the kind described, the lock levers and oerative on the edges of combination with clamping bars, of lock theengaging bars. levers having a cramping-- biting action on 4. In adevice of the kind described, the certain of said bars and havingprojecting combination with clamping bars, of, lock ends bearing againstadjacent bars, said levers-liavingperforations with biting edges barshaving stops at their ends preventing havingv a cramping action on barspassed said lock levers from becoming displaced. therethrongh, saidlevers having bifurcated In testimony whereof I affix my signature(finds gliat embrace thgl eiges dof adjacent in presence of twowitnesses.

ars, e projecting en so sai lock levers also having wedge receivingnotches, and FREDERICK KEES' wedges working in the said notches and\Vitn'esses: v pressing against the edges of adjacent bars. HARRY D.Krnconn,

5. In a clamping device of the kind de- F. D. MERCHANT.

